Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7b02dbbe1d2835…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 11:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e50fbe31f7e02c57bdfbfffa0149f133 SHA-1: 18044629179e91cf0b0c69283aeb610b0d6758a5 SHA-256: ce7b02dbbe1d283558ae0d72f02f9788fb4983098856d9106feea4a0207fb8e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML and ClamAV, indicating it likely serves as a phishing lure. The document functions as a link farm, directing users to various external URLs, some of which are hosted on compromised CMS upload storage. The presence of numerous links suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=john+deere+r72+manual+free+download PDF link annotation
    • https://acconpriti.com/ckfinder/userfiles/files/34627273438.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/26347404525.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/03e60d1cd34243ae6e6fc03bc25480a7/11932500766.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210809_010701.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075c35c4265d---32961326168.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fd0f934d684---rudamat.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084abf59d2c8---wexagofadebikufefavubidet.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/navilubijaxapagiradutaju.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/67687686243.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/sezibodopovevokizutakeze.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/lizuj.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/17516791617.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/889039cca0f1616474ce600ff1c89afd/82435221282.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/f9aeb129e566b0df5f8f65bab7d695fe/weperatidojovojamoja.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160932948cbfc5---55954880590.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/jkqblk12asst67a7dp93ij5sq4/mewuzafawezavimivinojop.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/54056167915.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/1689661038.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/9140356da86976a4ef219132ab34ab07/tafavituwevurekepo.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/eae6feabaad439519bed0898aa4fc4e7/34156150745.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/1629154936.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/24163889795.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/1516502239610e0a5053a3b.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/be0c5c84d06fa85faabf96c9ebca315f/vusapuxinefogureleletege.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19F 10608 bytes
SHA-256: 51f37b36a48dc56c0662dd7a8758d5ef7c9a3926a803be0bbf1da49dd46c3568
font_01_sfnt_off0000e9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D0 17792 bytes
SHA-256: 4a4d17ea06b1bba9e32d942344b1dc4c52b34e40dfdbcfd093083db4cf46804c
font_02_sfnt_off00011868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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